I’ll go to America to strengthen my English it isn’t too expensive.A. exceptB. providedC.

问题补充：

I’ll go to America to strengthen my English it isn’t too expensive.A. exceptB. providedC. assumedD. unless

答案：

考查状语从句。Provided/providing/assuming(that)…是conj.，引导从句，表示“假设，如果”。